Multi-layered metal plate with excellent damping capacity

Abstract

A multi-layered metal plate with excellent damping capacity and particularly, to a multi-layered metal plate with excellent damping capacity and a method for manufacturing it, is less costly since the plate can be simply manufactured by simply attaching a thin plate on a main metal plate by the methods such as welding and the like, has excellent damping capacity and especially can be easily shaped. In addition, in the plate, the secondary plate is attached on one or both surfaces of the main metal plate.

What is claimed is:  
     
       1. A multi-layered metal plate with excellent damping capacity, made by attaching a secondary plate having a thickness smaller than one fifth of the thickness of a main metal plate, onto the main metal plate so that the spacing between the two plates becomes 0.01 mm˜3 mm. 
     
     
       2. The plate of  claim 1 , wherein the spacing between the secondary plate and the main metal plate is 0.1 mm˜0.5 mm. 
     
     
       3. The plate of  claim 1 , wherein the secondary plate is attached on the both surfaces of the main metal plate. 
     
     
       4. The plate of  claim 1 , wherein the thickness of the secondary plate is one fifth˜one thirtieth of the thickness of the main metal plate. 
     
     
       5. A method for manufacturing a multi-layered metal plate with excellent damping capacity, comprising the steps of: 
       processing a main metal plate to have a predetermined curvature corresponding to the preferable usage;  
       attaching a secondary plate having a thickness smaller than one fifth of the thickness of a main metal plate, onto the main metal plate so that the spacing between the two plates becomes 0.01 mm˜3 mm.  
     
     
       6. The method of  claim 5 , wherein the secondary plate is attached on a surface of the main metal plate. 
     
     
       7. The method of  claim 5 , wherein the secondary plate is attached on the both surfaces of the main metal plate. 
     
     
       8. The method of  claim 5 , wherein attachment of the secondary plate uses the spot welding method. 
     
     
       9. The method of  claim 5 , wherein the shape of the processed main metal plate is a tube shape.